insidiousness

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noun

A surreptitious harmfulness, quality of entrapment, or treacherousness; the characteristic of being insidious.

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Meanings

nouninsidiousness (usually uncountable, plural insidiousnesses)

plural insidiousnesses

  1. uncountableusuallyA surreptitious harmfulness, quality of entrapment, or treacherousness; the characteristic of being insidious.

    This lent a new insidiousness to his temptation, since her contempt would be a refuge from his own.

    1900, Edith Wharton, chapter 8, in The Touchstone

Origin

From insidious + -ness.

Full word history & related roots →

Translations

Bulgarian коварство
  • коварство (kovarstvo)the characteristic of being insidious
Spanish insidia
  • insidiathe characteristic of being insidious
Cite this entry
APA

insidiousness. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/insidiousness

MLA

“insidiousness.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/insidiousness. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “insidiousness,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/insidiousness.

Source: insidiousness on Wiktionary, CC BY-SA 4.0.